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Hi,
How to check if list is empty
So if pass null or empty string to the list.. this if condition doesn't work, it still enters the if statement
If (list && list.elements() && list.empty())
How to check for null and empty string?
That's correct. If you create a list and one element (e.g. containing an empty string, for example), the list is not null, elements() returns 1 and empty returns false, because the list isn't empty - it contains one element.
If you want to check values of elements inside the list, you'll need to iterate the list and look at those elements.
For example:
ListEnumerator enumerator = list.getEnumerator(); while (enumerator.moveNext()) { if (!enumerator.current()) { ... } }
Hi Martin,
It doesn't work. If I pass "" or null
If(!enumerator.current()) doesn't work..it enters the if statement in both cases
If it enters the block, it works correctly. The condition says "if the current value is empty". Maybe you overlooked the negation (! operator).
Your question was "How to check for null and empty string?".
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